<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			ul{
				margin: 0;
				padding: 0;
			}
			#box{
				border: solid 1px red;
			}
			
			#box ul{
				/*overflow: hidden;*/
				/*width: 300px;
				height: 150px;*/
			}
			/*#box ul:after{
				  content:"";clear:both;display:block;height:0;overflow:hidden;
			}*/
			
		    #box ul li{
		    	float: left;
		    	width: 50px;
		    	margin-left: 20px;
		    }
		    
		    /*#box .float1, #box .float2{
		    	float: left;
		    }
		    */
		    .clear{
		    	clear: both;
		    }
		    
		    .children_left_float > div{
		    	float: left;
		    }
		    .children_left_float:after{
		    	 content:"";clear:both;display:block;height:0;overflow:hidden;
		    }
		    
		</style>
	</head>
	<body>
			<div id="box" class="">
				<ul class="test">
					<li>test1</li>
					<li>test2</li>
					<li>test3</li>
				</ul>
				<div class="clear"></div>
				<!--<div class="foat1">
					foat1
				</div>
				<div class="foat2">
					foat2
				</div>-->
				<!--<div class="clear"></div>-->
			</div>	
			<div>
				茫茫人海，芸芸众生
			</div>
			
	</body>
</html>
